Submission #604419

#	Time	Username	Problem	Language	Result	Execution time	Memory
604419		maximath_1	Match (CEOI16_match)	C++11	0 / 100	0 ms	212 KiB

match

#include <bits/stdc++.h>
using namespace std;

int main(){
	cin.tie(0) -> sync_with_stdio(0);

	string s; cin >> s;
	stack<char> cb;
	int n = s.size();
	for(int i = 0; i < n; i ++){
		if(cb.empty()) cb.push(s[i]);
		else if(cb.top() != s[i]) cb.push(s[i]);
		else cb.pop();
	}
	if(cb.size()){
		cout << -1 << endl;
		return 0;
	}

	vector<int> gg[30];
	for(int i = 0; i < n; i ++)
		gg[s[i] - 'a'].push_back(i);

	string ans = "";
	for(int i = 0; i < n; i ++) ans += '(';
	for(int i = 0; i < 30; i ++) if(gg[i].size()){
		if(gg[i].size() & 1){
			cout << -1 << endl;
			return 0;
		}

		for(int j = gg[i].size() / 2; j < gg[i].size(); j ++)
			ans[gg[i][j]] == ')';
	}
	cout << ans << endl;
}

Compilation message (stderr)

match.cpp: In function 'int main()':
match.cpp:32:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |   for(int j = gg[i].size() / 2; j < gg[i].size(); j ++)
      |                                 ~~^~~~~~~~~~~~~~
match.cpp:33:18: warning: value computed is not used [-Wunused-value]
   33 |    ans[gg[i][j]] == ')';

• Subtask 1: 0 / 10
• Subtask 2: 0 / 27
• Subtask 3: 0 / 63